/Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/ViewModels/HierarchyEditor/NiagaraUserParametersHierarchyViewModel.h
FNiagaraUserParameterHierarchyDragDropOp ( [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FNiagaraHierarchyItemViewModelBase](API\Plugins\NiagaraEditor\ViewModels\HierarchyEditor\FNiagaraHierarch-_6) > UserParameterItem )